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125 lines
4.6 KiB
C
125 lines
4.6 KiB
C
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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// This code is based on Lua 5.x implementation licensed under MIT License; see lua_LICENSE.txt for details
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#pragma once
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// When debugging complex issues, consider enabling one of these:
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// This will reallocate the stack very aggressively at every opportunity; use this with asan to catch stale stack pointers
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// #define HARDSTACKTESTS 1
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// This will call GC validation very aggressively at every incremental GC step; use this with caution as it's SLOW
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// #define HARDMEMTESTS 1
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// This will call GC validation very aggressively at every GC opportunity; use this with caution as it's VERY SLOW
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// #define HARDMEMTESTS 2
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// To force MSVC2017+ to generate SSE2 code for some stdlib functions we need to locally enable /fp:fast
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// Note that /fp:fast changes the semantics of floating point comparisons so this is only safe to do for functions without ones
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#if defined(_MSC_VER) && !defined(__clang__)
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#define LUAU_FASTMATH_BEGIN __pragma(float_control(precise, off, push))
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#define LUAU_FASTMATH_END __pragma(float_control(pop))
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#else
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#define LUAU_FASTMATH_BEGIN
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#define LUAU_FASTMATH_END
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#endif
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// Used on functions that have a printf-like interface to validate them statically
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#if defined(__GNUC__)
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#define LUA_PRINTF_ATTR(fmt, arg) __attribute__((format(printf, fmt, arg)))
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#else
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#define LUA_PRINTF_ATTR(fmt, arg)
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#endif
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#ifdef _MSC_VER
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#define LUA_NORETURN __declspec(noreturn)
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#else
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#define LUA_NORETURN __attribute__((__noreturn__))
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#endif
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/* Can be used to reconfigure visibility/exports for public APIs */
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#define LUA_API extern
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#define LUALIB_API LUA_API
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/* Can be used to reconfigure visibility for internal APIs */
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#if defined(__GNUC__)
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#define LUAI_FUNC __attribute__((visibility("hidden"))) extern
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#define LUAI_DATA LUAI_FUNC
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#else
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#define LUAI_FUNC extern
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#define LUAI_DATA extern
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#endif
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/* Can be used to reconfigure internal error handling to use longjmp instead of C++ EH */
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#define LUA_USE_LONGJMP 0
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/* LUA_IDSIZE gives the maximum size for the description of the source */
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#define LUA_IDSIZE 256
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/*
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@@ LUAI_GCGOAL defines the desired top heap size in relation to the live heap
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@* size at the end of the GC cycle
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** CHANGE it if you want the GC to run faster or slower (higher values
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** mean larger GC pauses which mean slower collection.) You can also change
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** this value dynamically.
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*/
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#define LUAI_GCGOAL 200 /* 200% (allow heap to double compared to live heap size) */
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/*
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@@ LUAI_GCSTEPMUL / LUAI_GCSTEPSIZE define the default speed of garbage collection
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@* relative to memory allocation.
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** Every LUAI_GCSTEPSIZE KB allocated, incremental collector collects LUAI_GCSTEPSIZE
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** times LUAI_GCSTEPMUL% bytes.
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** CHANGE it if you want to change the granularity of the garbage
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** collection.
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*/
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#define LUAI_GCSTEPMUL 200 /* GC runs 'twice the speed' of memory allocation */
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#define LUAI_GCSTEPSIZE 1 /* GC runs every KB of memory allocation */
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/* LUA_MINSTACK is the guaranteed number of Lua stack slots available to a C function */
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#define LUA_MINSTACK 20
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/* LUAI_MAXCSTACK limits the number of Lua stack slots that a C function can use */
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#define LUAI_MAXCSTACK 8000
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/* LUAI_MAXCALLS limits the number of nested calls */
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#define LUAI_MAXCALLS 20000
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/* LUAI_MAXCCALLS is the maximum depth for nested C calls; this limit depends on native stack size */
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#define LUAI_MAXCCALLS 200
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/* buffer size used for on-stack string operations; this limit depends on native stack size */
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#define LUA_BUFFERSIZE 512
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/* number of valid Lua userdata tags */
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#define LUA_UTAG_LIMIT 128
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/* upper bound for number of size classes used by page allocator */
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#define LUA_SIZECLASSES 32
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/* available number of separate memory categories */
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#define LUA_MEMORY_CATEGORIES 256
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/* minimum size for the string table (must be power of 2) */
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#define LUA_MINSTRTABSIZE 32
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/* maximum number of captures supported by pattern matching */
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#define LUA_MAXCAPTURES 32
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/* }================================================================== */
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/* Default number printing format and the string length limit */
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#define LUA_NUMBER_FMT "%.14g"
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#define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */
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/*
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@@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
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** CHANGE it if your system requires alignments larger than double. (For
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** instance, if your system supports long doubles and they must be
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** aligned in 16-byte boundaries, then you should add long double in the
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** union.) Probably you do not need to change this.
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*/
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#define LUAI_USER_ALIGNMENT_T \
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union \
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{ \
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double u; \
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void* s; \
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long l; \
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}
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